They're, I agree. But it is a justification thing. They are inconsistent.Actually many who are pro-abortion - are anti-death penalty (which makes no sense)
and many Pro-life are are Pro death penalty - because the baby has no choice - but the convicted murder made his own choice
Scripture does not directly address abortion (except the abortionist compensate the father), but it does the death penalty.
To execute a person except as allowed in Scrioture (not partly) is definitely a sin. To kill a child is as well.